axmol/cocos2dx/label_nodes/CCLabelTTF.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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****************************************************************************/
#include "CCLabelTTF.h"
#include "CCDirector.h"
#include "shaders/CCGLProgram.h"
#include "shaders/CCShaderCache.h"
#include "CCApplication.h"

NS_CC_BEGIN

#if CC_USE_LA88_LABELS
#define SHADER_PROGRAM kCCShader_PositionTextureColor
#else
#define SHADER_PROGRAM kCCShader_PositionTextureA8Color
#endif

//
//CCLabelTTF
//
CCLabelTTF::CCLabelTTF()
: m_hAlignment(kCCTextAlignmentCenter)
, m_vAlignment(kCCVerticalTextAlignmentTop)
, m_pFontName(NULL)
, m_fFontSize(0.0)
, m_string("")
{
}

CCLabelTTF::~CCLabelTTF()
{
    CC_SAFE_DELETE(m_pFontName);
}

CCLabelTTF * CCLabelTTF::create()
{
    CCLabelTTF * pRet = new CCLabelTTF();
    if (pRet && pRet->init())
    {
        pRet->autorelease();
    }
    else
    {
        CC_SAFE_DELETE(pRet);
    }
    return pRet;
}

CCLabelTTF * CCLabelTTF::create(const char *string, const char *fontName, float fontSize)
{
    return CCLabelTTF::create(string, fontName, fontSize,
                              CCSizeZero, kCCTextAlignmentCenter, kCCVerticalTextAlignmentTop);
}

CCLabelTTF * CCLabelTTF::create(const char *string, const char *fontName, float fontSize,
                                const CCSize& dimensions, CCTextAlignment hAlignment)
{
    return CCLabelTTF::create(string, fontName, fontSize, dimensions, hAlignment, kCCVerticalTextAlignmentTop);
}

CCLabelTTF* CCLabelTTF::create(const char *string, const char *fontName, float fontSize,
                               const CCSize &dimensions, CCTextAlignment hAlignment, 
                               CCVerticalTextAlignment vAlignment)
{
    CCLabelTTF *pRet = new CCLabelTTF();
    if(pRet && pRet->initWithString(string, fontName, fontSize, dimensions, hAlignment, vAlignment))
    {
        pRet->autorelease();
        return pRet;
    }
    CC_SAFE_DELETE(pRet);
    return NULL;
}

bool CCLabelTTF::init()
{
    return this->initWithString("", "Helvetica", 12);
}

bool CCLabelTTF::initWithString(const char *label, const char *fontName, float fontSize, 
                                const CCSize& dimensions, CCTextAlignment alignment)
{
    return this->initWithString(label, fontName, fontSize, dimensions, alignment, kCCVerticalTextAlignmentTop);
}

bool CCLabelTTF::initWithString(const char *label, const char *fontName, float fontSize)
{
    return this->initWithString(label, fontName, fontSize, 
                                CCSizeZero, kCCTextAlignmentLeft, kCCVerticalTextAlignmentTop);
}

bool CCLabelTTF::initWithString(const char *string, const char *fontName, float fontSize,
                                const cocos2d::CCSize &dimensions, CCTextAlignment hAlignment,
                                CCVerticalTextAlignment vAlignment)
{
    if (CCSprite::init())
    {
        // shader program
        this->setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(SHADER_PROGRAM));
        
        m_tDimensions = CCSizeMake(dimensions.width, dimensions.height);
        m_hAlignment = hAlignment;
        m_vAlignment = vAlignment;
        m_pFontName = new std::string(fontName);
        m_fFontSize = fontSize;
        
        this->setString(string);
        
        return true;
    }
    
    return false;
}

void CCLabelTTF::setString(const char *string)
{
    CCAssert(string != NULL, "Invalid string");
    
    if (m_string.compare(string))
    {
        m_string = string;
        
        this->updateTexture();
    }
}

const char* CCLabelTTF::getString(void)
{
    return m_string.c_str();
}

const char* CCLabelTTF::description()
{
    return CCString::createWithFormat("<CCLabelTTF | FontName = %s, FontSize = %.1f>", m_pFontName->c_str(), m_fFontSize)->getCString();
}

CCTextAlignment CCLabelTTF::getHorizontalAlignment()
{
    return m_hAlignment;
}

void CCLabelTTF::setHorizontalAlignment(CCTextAlignment alignment)
{
    if (alignment != m_hAlignment)
    {
        m_hAlignment = alignment;
        
        // Force update
        if (m_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

CCVerticalTextAlignment CCLabelTTF::getVerticalAlignment()
{
    return m_vAlignment;
}

void CCLabelTTF::setVerticalAlignment(CCVerticalTextAlignment verticalAlignment)
{
    if (verticalAlignment != m_vAlignment)
    {
        m_vAlignment = verticalAlignment;
        
        // Force update
        if (m_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

CCSize CCLabelTTF::getDimensions()
{
    return m_tDimensions;
}

void CCLabelTTF::setDimensions(const CCSize &dim)
{
    if (dim.width != m_tDimensions.width || dim.height != m_tDimensions.height)
    {
        m_tDimensions = dim;
        
        // Force update
        if (m_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

float CCLabelTTF::getFontSize()
{
    return m_fFontSize;
}

void CCLabelTTF::setFontSize(float fontSize)
{
    if (m_fFontSize != fontSize)
    {
        m_fFontSize = fontSize;
        
        // Force update
        if (m_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

const char* CCLabelTTF::getFontName()
{
    return m_pFontName->c_str();
}

void CCLabelTTF::setFontName(const char *fontName)
{
    if (m_pFontName->compare(fontName))
    {
        delete m_pFontName;
        m_pFontName = new std::string(fontName);
        
        // Force update
        if (m_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

// Helper
bool CCLabelTTF::updateTexture()
{
    CCTexture2D *tex;
    
    // let system compute label's width or height when its value is 0
    // refer to cocos2d-x issue #1430
    tex = new CCTexture2D();
    if (!tex)
    {
		return false;
    }
    
    tex->initWithString( m_string.c_str(),
                        m_pFontName->c_str(),
                        m_fFontSize * CC_CONTENT_SCALE_FACTOR(),
                        CC_SIZE_POINTS_TO_PIXELS(m_tDimensions), 
                        m_hAlignment,
                        m_vAlignment);
	
    this->setTexture(tex);
    tex->release();
	
	CCRect rect = CCRectZero;
    rect.size = m_pobTexture->getContentSize();
    this->setTextureRect(rect);

    return true;
}

NS_CC_END